/// <summary>
/// Prepares this leader for the next entry. Returns false if there are no entries left to introduce.
/// </summary>
public bool Reset(World World, Stone Stone)
{
this.PressureThreshold = Settings.Current.StoneIntroductionPressureThreshold;
this.Timeout = Settings.Current.StoneIntroductionTimeout;
this.Next = GetNext(World, Stone);
return this.Next != null;
}
/// <summary>
/// Updates this leader state by the given amount of time. Returns true if a new stone was introduced.
/// </summary>
public bool Update(World World, Stone Stone, double Time, double Expansion, out Stone Introduced)
{
Vector dir;
if (World._Pressure(Stone, out dir) < this.PressureThreshold)
{
if (World.ContainsEntry(this.Next))
{
this.Next = GetNext(World, Stone);
if (this.Next == null)
{
Introduced = null;
return true;
}
}
Introduced = new Stone(this.Next);
Introduced.Position = Stone.Position;
double dirlen = dir.Length;
if (dirlen > 0.001)
{
dir = dir.Normal;
Introduced.Velocity = Stone.Velocity + dir * Settings.Current.StoneIntroductionSpeed;
Introduced.Position += dir * Stone.Radius;
}
_Tweak(this.Next, ref Introduced.Position);
return true;
}
else
{
this.PressureThreshold *= Expansion;
this.Timeout -= Time;
Introduced = null;
return false;
}
}
/// <summary>
/// Tries to get a stone for the given entry. Returns false if none exists in this world.
/// </summary>
public bool TryGetStone(Entry Entry, out Stone Stone)
{
return this._Stones.TryGetValue(Entry, out Stone);
}
/// <summary>
/// Introduces a stone to the world.
/// </summary>
private void _Introduce(Stone Stone, Entry Entry)
{
foreach (Entry p in Entry.Previous)
{
Stone prev;
if (this._Stones.TryGetValue(p, out prev))
prev.Next = Stone;
}
Entry n = Entry.Next;
Stone next;
if (n != null && this._Stones.TryGetValue(n, out next))
Stone.Next = next;
this._Stones[Entry] = Stone;
this._Insert(Stone, _GetZone(Stone.Position));
this.MakeLeader(Stone);
}
/// <summary>
/// Determines whether this world contains a stone for the given entry.
/// </summary>
public bool ContainsEntry(Entry Entry)
{
return this._Stones.ContainsKey(Entry);
}
/// <summary>
/// Inserts a stone for the given entry. There must not be any existing stones for the entry.
/// </summary>
public Stone Insert(Entry Entry, Vector Position, Vector Velocity)
{
Stone stone = new Stone(Entry);
stone.Position = Position;
stone.Velocity = Velocity;
this._Introduce(stone, Entry);
return stone;
}
/// <summary>
/// Gets the stone for the given entry, or null if it is not in the world.
/// </summary>
public Stone this[Entry Entry]
{
get
{
Stone stone;
this._Stones.TryGetValue(Entry, out stone);
return stone;
}
}
/// <summary>
/// Calculates the weight of an entry, and updates all dependent entries.
/// </summary>
private void _CalculateWeight(Entry Entry)
{
uint weight = 1;
foreach (Entry prev in Entry.Previous)
weight += prev.Weight;
Entry.Weight = weight;
Entry cur = Entry.Next;
while (true)
{
if (cur == null) return;
if (cur.Weight == uint.MaxValue) return;
if (cur == Entry)
{
Entry.Weight = uint.MaxValue;
cur = Entry.Next;
while (cur != Entry)
{
cur.Weight = uint.MaxValue;
cur = cur.Next;
}
}
cur.Weight += weight;
cur = cur.Next;
}
}
/// <summary>
/// Gets the domain entry for the given value. Returns false if it does not exist.
/// </summary>
public bool TryGetEntry(uint Value, out Entry Entry)
{
return this._Entries.TryGetValue(Value, out Entry);
}
/// <summary>
/// Creates an entry for the given value. The entry must not already exist and there should be a lock on this._Entries.
/// </summary>
private Entry _Create(uint Value, uint Next)
{
Entry entry = new Entry(Value);
Entry next;
List<Entry> divergent;
if (this._Entries.TryGetValue(Next, out next))
{
entry.Next = next;
next.Previous.Add(entry);
}
else
{
if (!this._Divergent.TryGetValue(Next, out divergent))
this._Divergent[Next] = divergent = new List<Entry>();
divergent.Add(entry);
}
if (this._Divergent.TryGetValue(Value, out divergent))
{
entry.Previous = divergent;
this._Divergent.Remove(Value);
foreach (Entry p in divergent)
{
p.Next = entry;
}
}
else
{
entry.Previous = new List<Entry>();
}
this._Entries[Value] = entry;
this._CalculateWeight(entry);
return entry;
}
public Stone(Entry Entry)
{
this.Entry = Entry;
this.Radius = Math.Log10((double)Entry.Value + 100.0) * 0.25;
}